Spray-nozzle.



C. L. PEPPER.

SPRAY NOZZLE.

Awucmow FILED MW. 29, ISI.

PatentediNuv. 21, 1916 v I V6 to by n n r w 1 ED STAS PATENT U-EFlfiill.

CHESTER L. PEPPER, OF CHELSEA, MASSACHUeJIiT'LTS, ASSIGNCRI 1 30 SC'U'TTE ck KOEBTING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, ACORPOELHLIOIZ O13 PENNSYLVANIA.

SPRAY-NOZZLE.

Specification of Letters Patent.

Patented Nov. 2-3,, 1916.

Application filed November 29, 1811. Serial No. 663,015.

5 hflassachusetts', have invented certain new and useful Improvements inSpray-Nozzles, fully described and represented in the. followingspecification and the accompanying drawings, forming a part of the same.

This invention relates to a spray nozzle of that class in which theliquid in passing through the nozzle is given a. spiral or ad vancingrotary. motion by means of spiral vanes or blades located Within thenozzle.

The object of the invention is to provide an improved nozzle of thiskind of simple construction and eflicient in opca tion and whereby aspray of more solid, rather than hollow, conical form is secured.

A further object is to provide a nozzle which is adjustable fordifferent spray angles and for securing the admixture of air with thejet before it leaves the nozzle or for a side discharge of water in finejets.

The invention aims especially to provide a spray nozzle which shall showhigh efficiency.

when used for spray cooling of water and other liquids.

Nozzles made in accordance with the invention will be equallyellicient-wheu used for other purposes to which they are adapted, andthey may be applied to a greatvariety of uses, for some ofwhich,however, it may be desirable to omit in the construction of the nozzlescertain features of the Iinvcntiou. The accompanying drawings shoneanozzle constriuatiou to embody the various featurcs of the invention inthe prefcrrcil form. In said drawvlugsz-Figurc 1 is a centrallongitudinal. section of the nozzle except that the spiral varies forimparting rotary motion to the fluid are shown as they would appear inelevation. Fig. 2 is a view of the discharge or tip end of the nozzleshowing the same partly in side elevation and paltly in centrallongitudinal section and with the tip piece in a dill'ercnt position ofadjustucut from that shownin Fig. 1. Fig. 3 is a cross sectional viewtaken on line 30f Fig. 1.: i

Referring to the drawings, the nozzle tube as shown is made-up of acylindricalpor-.

' tionfor body 10, and a tapered front portion to the interior of thenozzle.

pose piece. 11 which is gletael' able fr o n- :the body 10; as by havinga screw thread connection therewith, to give ready access 1V ithin thenozzle tube there are a plurality of spiral vanes 12 formed to leave anunobstructed axial path or channel 13 for the water or other liquid.These vanes in the preferred construction shown are located within thecylindrical body portion 10 and are cast or otherwise formed integraltherewith. extending from the side wall inward and end ing short of theaerial line so that their inner edges extend spirally about a centralopen space which forms an unobstructed path or channel for the freemovement of the liquid.

The van I serve to give the advancing liquid the desir d rotary orspiralmotion, which, the velocity being, greatly increased as the liquidpasses through the coiukractcd nose piece. causes theliquid as it leavesthe nozzle mouth to break into a spray which advances from. the nozzlein the form or a: cone; and

the unobstructed central channel around which the vanes curve allows thecentral portion of the stream of liquid to move faster than thesurrounding portions which encounter the varies. and so insures a solidmass of liquid in the tip portion oi? the zle with the result that thespray :Hl'l from the nozzle in the form of a con u nichis solid orsubstantially so as distingn" from a hollow conical spray suchras iduced by a nozzle having the spiral vanes mounted around a. centralspindle.

The nozzle has a tip 15 which is adjustable for 'arying the spray angle.It is preterahly formed to provide flaring n'zouth as shown. whichshould he at in; rmrrowest point of slightly greater diameter than theinternal diameter of the end or narrowest point of the-1108*." piece,and it is secured to the nose piece lay aninteriorly threaderl' flange16 which screws onto the threaded end of the nose piece, so that-the tipmay be adjusted to stand otl' more or less beyond the end of the nosepiece by being; turned in one, direction or the other thermal. han thetip is adjusted to a position close to the end,

of the nose, a comparatively wide spreading spray is produced; and asthe tip set farther oil". from the end-of the nose, a narrower .ullonger, or higher. spray results.

' The SIHICQ between the end of the nose piece and, the shoulder at theinner end of the flange of the tip forms an annular passage li llilllUlltlH lo create a partial vacuum 1h flu: pafisng't. whereby airentering the pas- .--.:lgu lhrough the openings 18 is sucked intoll'nliquid as it issues from the nozzle. The air so sucked into the jetcauses the spray to hrcal-r up 'into liner particles and secures av moreintimate n'lixturc of air with the s n'ayeil liquid. This is ofadvantage in many uses oi the nozzle, as for example, and rvqaacially.when the nozzle is used in spray cooling of water. In nozzles used forfountain also, this feature has the advantage of thc'jet or spray toappear much than without the sucked in air. lVhon the tip is screwed outto a position 11:. shown in Fig. 2%, for example, the passtage 17 iswidened and the air suction is broken and wa ter will then enter thepassage and escape in fine jets through the openings 18 and also throughthe openings 19 which with the tip in this position are open-to thepassage.

It is to be understood that the invention is not to be limited to theexact construction shown. and to which the foregoing description hasbeen largely confined, but that it includes ,changcs therein andmodifications thereof within the; claims.

ll ha-t' is claimed is 1: A spray nozzle having a spray produc ingspiral vane for imparting rotary mo tion to the advancing fluid wherebythe fluid is caused to" break into spray as it" leaves the nozzle, saidvane extending inward from the nozzle wall and ending short of the axisof the nozzle so as .to leave an unobstructed axial nhannel or path toallow the central portion of the stream of liquid to advance faster-thanthe surrounding portion said axial channel or path being defined by theedge of the vane and being in open communication with the surroundingspace through which the vane extends, and having a velocity increasingunobstructed tapering channel beyond the spiral vane.

2. A spray nozzle having a plurality of intercoiling spray producingspiriil lanes for imparting rotary motion to the advancing fluid wherebythe fluid is caused to break into spray asit leaves the nozzle,

wanes extending inward from the n0zzle wall and ending short of the axisof the nozzle so as to leave an unobstructed axial. channel. or path toallow the central portion {of l the; stream/pf liquid;

to advance faster than the snrrrmnding por tion, said asial channel orpath being defined by the edges of the vanes and being in openconnninlication with the channels betn'een the veins, and having avelocity-increasing unobstructed tapering channel beyond the spiralvanes.

3. A spray nozzle having a spray producing spiral vane for impartingrotary motion to the advancing fluid whereby the fluid is caused tobreak into spray as it leaves the nozzle, said vane extending inwardfrom the nozzle wall and ending short of the axis of the nozzle so as toleave an unobstructed axial channel or path to allow the central portionof the stream of liquid toadvance faster than the surrounding portion,said axial channel or path being defined by the edge of the vane andbeing in open coinrn'unication with the surrounding space through whichthe vane extends, and having a velocity-increasing unobstructed taperingchannel beyond the spiral vane, and a suction inlet for admitting air ata point near the mouth of the nozzle.

4. 'A spray nozzle having a flaring mouth, an air suction inlet foradmitting air to the jet at a point just beyond the point of narrowestcross-section of the nozzle, and means for imparting spray producingrotary motion to the "fluid advancing, through the nozzle tube wherebythe fluid is caused to break into spray as it leaves the nozzle.

5. A. spray nozzle comprising a nozzle tube having a tapering noseportion, and a tip piece adjustable toward and from the end of thenozzle tube to vary the spray a11- gle and formed to provide a passagebetween it and the end of the nozzle tube to serve as an air suctionpassage when the tip piece is close to the end of the nozzle tube and asa discharge passage when the tip piece is moved away from the end of thenozzle tube.

6. A spray nozzle comprising a nozzle tube having a tapering noseportion and provided with means for imparting rotary motion'to fluidadvancing therethrough, and an adjustable tip shaped to provide apassage between it and the end of the nozzle 11 tube to serve as an airsuction passage when the tip 1s ad usted to a position close to the endof the nozzle tube and as a discharge passage when the tip 'is movedaway from 12 by the tipmaybe adjustditoward and from the end of thenozzle tube and having openings to the atmosphere from the space betweenthe end of the nozzle tube and the tip to serve as air suction inletswhen the tip is close to the end of the nozzle tube and as dischargeoutlets when the tip is adjusted to a position fiuthel' away from theend of the nozzle tube.

In testimony whereof, I have hereunto set my ham}, in the presence oftwo sub- 10 seuhmg wltnesses. A

CHESTER L. PIEZPPLER.v

Witnesses JOSEPH. M. SHAFEER, SAMUEL K. HAMILTON.

